code: def test_access_class():
      def func():
          pass
  
      pxy = _FunctionProxy(fast=_Unusable(), slow=func)
      pxy.__class__
  
imports: import inspect
  from functools import partial
  from io import StringIO
  import numpy
  import pytest
  from cudf.pandas.fast_slow_proxy import _fast_arg, _FunctionProxy, _slow_arg, _transform_arg, _Unusable, make_final_proxy_type, make_intermediate_proxy_type
label_desc: Use image node_id 12 for calling a global function with example usage: test_access_class() without return types